It's the moment that every mother fears: her three-year-old son, Ben is gone. And no one can find him. Despite a police search that becomes a nationwide obsession, Ben has vanished, leaving behind a family that will be torn apart with anguish. Until, nine years later, a twelve-year-old boy knocks on their door - a boy who does not know them, but who will irrevocably twist their lives a second time . . .